错误的产品URL magento

我一直在开发自定义向上销售相关产品脚本，该脚本显示4个随机产品。

问题是：

正常产品url为：

/店铺/$productname

这有时会生成url，如：/$productname/

或类似于以下url的url：/cocatalog/product/view/id/$productID/4/s/$productname/category/$categoryid/

我想让我的所有URL都一样，所以：/shop/$productname

<div class="upsell">
<h2>You might be interested in</h2>
    <?php // List mode ?>
    <?php $_iterator = 0; ?>
    <?php // Grid Mode ?>
    <table class="products-grid upsell" id="upsell-product-table">
                    <tbody>
                    <tr>
    <?php $_collectionSize = $_productCollection->count() ?>
    <?php $_columnCount = $this->getColumnCount(); $_columnCount=4; ?>
    <?php $i=0; foreach ($_productCollection as $_product): ?>
        <?php if ($i++%$_columnCount==0): ?>
        <?php endif ?>
            <td>
            <?php // Initiate product model
$product = Mage::getModel('catalog/product');
// Load specific product whose tier price want to update
$product ->load($_product->getId()); ?>
                <a href="<?php echo $product->getProductUrl() ?>" title="<?php echo $this->stripTags($this->getImageLabel($product, 'small_image'), null, true) ?>" class="product-image"><img src="<?php echo $this->helper('catalog/image')->init($product, 'small_image')->resize(170); ?>" width="125" height="125" alt="<?php echo $this->stripTags($this->getImageLabel($_product, 'small_image'), null, true) ?>" /></a>
                 <h3 class="product-name"><a href="<?php echo $product->getProductUrl() ?>" title="<?php echo $this->stripTags($product->getName(), null, true) ?>"><?php echo $_helper->productAttribute($product, $product->getName(), 'name') ?></a></h3>
                <?php echo $this->getPriceHtml($product, true) ?>
            </td>
        <?php endforeach; ?>
        </tr>
        </tbody>
        </table>
</div>

$this->getUrl('shop').$product->getUrlPath()

$product->getProductUrl()

$product->getProductUrl()